Black Tourmalinated Quartz Plain Hearts measure approximately 8x8mm to 9x9mm in size, gemstones have a glass-like luster with good brilliance, the Crystal Quartz bodies have only very slight internal features including Black Tourmaline needles, the gemstones are well matched for body tone and quality, the Tourmalinated Quartz beads have an excellent heart shape and smooth polish, these Black Tourmalinated Quartz beads show numerous fine black needles with excellent make.